1. No pawnbroker shall hereafter sell or have in his possession for sale or to loan or give away, any machine gun, automatic rifle, revolver, pistol, or other firearm, or other instrument of any kind known as a blackjack, slungshot, billy, sandclub, sandbag, bludgeon, metal knuckles, dagger, dirk, dangerous knife, stiletto, bomb or other high explosive. Any pawnbroker violating the provisions of this act shall be guilty of a high misdemeanor and punished accordingly.